Source Naturals Source Naturals Serene Science L-Tryptophan, Positive Mood*, 500 mg - 120 Capsules

The essential amino acid L-tryptophan is the precursor of two natural compounds of great importance. About this item L-Tryptophan is an essential amino acid. Suggested use: take 1 capsule three times daily, between meals. Well Made Supplement Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no preservatives, or artificial color, flavor or fragrance. Over 40 Years of Trust. Source Naturals was created in 1982 by CEO Ira Goldberg to support everyone’s potential to enjoy optimal health. Manufactured in the USA. Manufactured in Scotts Valley, CA, under the Good Manufacturing Practices. See more product details